Food service tray



FIG. 1 is a top perspective view of a food service tray showing my new design;

FIG. 2 is a front or rear elevational view thereof on a reduced scale;

FIG. 3 is a left or right side elevational view thereof;

FIG. 4 is a bottom plan view thereof of FIG. 2; and

FIG. 5 is a top plan view thereof of FIG. 2. 

The ornamental design for a food service tray, as shown and described. 